I have a iMac 27. The two monitors to my left and right are being handled by the two thunderbolt ports on the back and a Apple piece of hardware. My USB Displaylink adapter is not working like everyone else's. I figured I would give the stats incase it helps.

Those instructions may work if you didn't have a DisplayLink driver installed when you upgraded to High Sierra. For those who already had the drive installed, the authorization doesn't show when you uninstall/reinstall.

Those instructions may work if you didn't have a DisplayLink driver installed when you upgraded to High Sierra. For those who already had the drive installed, the authorization doesn't show when you uninstall/reinstall.

I can also confirm the issue still exists with Beta 2 of 10.13.4.

Yes, it was a clean install, don't know why it can't be fixed, such a shame as I haven't used my dock for two months until today.

Those instructions may work if you didn't have a DisplayLink driver installed when you upgraded to High Sierra. For those who already had the drive installed, the authorization doesn't show when you uninstall/reinstall.